berqener



(No Model.) I 2 Sheet-Sheet 1. O. BERGENER.

TUBULAR LANTERN.

No. 378,648. Patented Feb. 28, 1888.

(No Model.) 2 Sheets-Sheet 2. O. BERGENER.

TUBULAR LANTERN.

Patented Feb. 28, 1888.

N Pains, Plvolo-Lillwgnpher, Washingmn, o c.

lUnirrn' STATES.

PATENT CHARLES BERGENER, OF ROCHESTER, NEIV YORK, ASSIGNOR TO THE C. T. HAM MANUFACTURING COMPANY, OF SAME PLACE.

TU BULAR LANTERN.

SPECIFICATION forming part of Letters Patent No. 378,648, dated February 28,1888.

Application filed July 8,1887. Serial No. 243,759.

ro ject the production of a lantern of improved appearance, cheap in construction, and possessing the capacity of maintaining a constant flame in the highest winds.

My invention is fully described and illustrated in the following specification and accompanying drawings, and the novel features thereof specified in the claims annexed to the said specification.

My improvements in lanterns are represented in the accompanying drawings, in which Figure 1 .is a side elevation. Fig. 2is a side elevation taken at right angles to Fig. 1. Fig. 3 is a vertical section through the top of the lantern on the line 3 3, Fig. 2. Fig. 4 is a horizontal section on the line 4. 4, Figs. 2 and 3.

In the accompanying drawings, representing my improvements in lanterns, A is the base, which contains the oil-reservoir and wicktube, and is surmounted by the burner-cone. Suitable air-passages are formed above the oilreservoir, throughwhich air is supplied to the flame from the descending tubes 13 B.

The perforated globe-supporting plate 0 rests on an enlarged portion of the burnercone, as shown in the drawings, being held in place by the pressure of a spring in the dome of the lantern transmitted through the globe D.

The lantern-domcE is supported by the airtubes B B, which pass through the stiffeningplate or reflector F. The dome E is provided with projections G, Figs. 1 and 2, which extend through the plate F and are clinched on the under side thereof. Inside the dome is the globe -holding tube H, which is arranged to slide vertically in the inwardly-turned cap I of the dome E, so that the globe can be raised from the burner for lighting, or entirely removed, if desired. It will be observed that an annular air-chamber, J closed at top,is formed between the dome E and tubeH, which cham- (No model.)

ber communicates on each side with the air tubes B and through the row of perforations K in the tube H with the space inside the tube, near the upper part of the air-chamber. The air-chamber is open at the bottom, an an nular opening, I), Fig. 3,being left around the lower part of the tube I-I inside the reflector, which communicates with the space below said reflector and allows the passage of air verti cally between the inner margin of the opening in the reflector and the wall of tube H. The dome E does not extend down to the reflector, but terminates above it, so as to leave a space, It,below the lower edge of the dome and above the reflector, whereby is formed a passage for air connecting the space exterior to the lantern and above the reflector with the interior of the dome. A flange, 0, extends upward from the inner margin of the opening in the re flector. The width of the flange or ring 0 is preferably made at least equal to that of the openings R in the lower part of the dome E, immediately above the reflector; but air is permitted to pass into the annular air-chamber J around the upper margin of the ring 0, and for this reason the flange 0 should not be placed immediately below the vertical wall of the dome E in case said flange is made to extend as high as the lower edge of said wall, as the air-passage B would be closed by such construction.

The lantern will operate satisfactorily without the flange 0; butI prefer to employ it, even if its width be made less than as shown in the accompanying drawings.

The number of the projections G, by which the dome is fastened to the reflector, is not material; but in practice I generally use four.

The flange 0 may be in one piece with the re ing below on the shoulder a, formed on tube H, and at its upper end bears against the innor part of the dome, so that it tends to thrust the tube H and globe D toward the seat of the latter. The compression of the spring is conveniently effected by lifting the tube H, as indicated by dotted lines in Fig. 3, which operation permits the easy removal of the globe from the lantern. Above the tube H, and connected therewith in any suitable or preferred way, is placed the usual deflector, T, which permits the escape of the heated gases below it. The tube H is stiffened at its lower end by the bead e, which receives the upper end of the globe.

In order to hold the spring S in position, I employ the strips '0 12, Figs. 3 and 4, which extend from the ring to the cap I just outside the spring. The strips 12 12 also serve as guides for the tube H. They may be attached to the ring 0 or cap I in any convenient way, as by soldering, or, preferably, by forming tongues on the endsof the strips, which tongues are inserted in openings in the ring or cap and secured in place by bending or clinching.

My improved lantern is not only cheap to manufacture and convenient and durable in practical use, but it possesses the superior passage b be exceptionally sudden or strong,

the reaction from the upper part of the chamber J would send air out of opening R for the moment, and would to this extent relieve the tubes 13 from a sudden and disturbing rush of air in consequence of the aforesaid current.-

If, however, the lantern be suddenly raised and a downflow of air upon and about the whole lantern be thereby produced, the reflector and openings B have another very use ful effect. Such currents tend to prevent a regular supply of air to the lantern and to exhaust its contents. Thus, were the reflector absent, a flow of air down around the lanternsuch as would be produced by a downward blast of air or by suddenly raising the l'anternwould seriously affect the supply of air through the perforated plate 0, and might even extinguish the flame. Such sudden downward current would disturb the ordinary conditions also in and above tube H and in chamber I. By the action of the reflector such currents in the vicinage of thelantern-top are arrested, and in a lantern provided with openings R are in part deflected into the lantern-top and tend to counteract the disturbing dome to which the air-tubes were connected has been provided with a flange or skirt, beneath which air was admitted to an annular chamber communicating with the external tubes only; but in no lantern known prior to myimprovement have openings been provided above the reflector at the base of the dome, which latter, together with an inner wall or tube, served to include an air-chamber in communication with outer air-tubes, and also with the space within the inner tube immediately over the globe. A dome, spring, sliding tube, and ring have also been combined in a tubular lantern to press upon the top of the globe and hold thesame upon its base and yet allow its removal when desired, the structure being such that air admitted under a skirt or flange of the dome entered an annular chamber in communication with the air-tubes, and such constructions are not herein claimed. By the present improvement the tube H is normally seated on the globe, forming an extension thereof, and is open at the top for the free discharge of products of combustion, and is also perforated, as at K, for the passage of air from chamber I, which chamber has air-inlets at the base of the dome above the reflector, and also between the inner edge of the latter and tube H, and is in communication both with the external tubes and with the space within said tube H.

1. The combination, with the base, the burner, the globe supported on said base, the reflector, and the side airtubes of a tubular lamp, of the annular dome E and tube H, the two forming an annular air-chamber, J, closed at top by the dome and open at bottom, said dome E having openings R at its base and'immediately above the reflector, and said inner tube, H, being provided with perforations K near the top of the annular chamber, substantially as described, whereby downward currents of air striking the upper side of the reflector are directed into the chamber communicating both with the external air-tubes and the inner tube over the globe.

2. The combination, with the air-tubes of a tubular lantern, of dome E and perforated tube H, the two forming the annular air-chamber J, closed at its top by the dome and open at its bottom, said dome having openings R, and the reflector F, having flange 0 around its inner margin, substantially as described.

'3. The combination, in a tubular lantern, of tube l-I, normally forming an extension of the globe, a dome, E, air-tubes secured to said dome and communicating with the spacewithin the dome, and a reflector supported to leave an opening, as 6, next the tube H and an opening, as It, near the lower margin of the dome, substantially as specified.

4:. The combination, in a tubular lantern, of

a dome, E, rigidly secured to the air-tubes, the sliding tube H, provided with a shoulder, a, a spring surrounding the tube, and having a bearing on said shoulder at one end and on the interior of the dome at the other, and strips r, for retaining the spring in place and guiding the globe, substantially as specified.

5. The combination, in a tubular lamp or lantern, of the dome E and sliding tube H, norro mally an extension of the globe and open at the top, the two forming an annular air-chamber, J, closed at its top by the dome and open 

